/*
 * Copyright © 2018 organization baomidou
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.efeichong.dynamic;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;

/**
 * @author lxk
 * @date 2022/8/28
 * @description 动态数据源注解@DS拦截器
 */
public class DynamicDataSourceAnnotationInterceptor implements MethodInterceptor {

    private final DataSourceClassResolver dataSourceClassResolver;

    public DynamicDataSourceAnnotationInterceptor() {
        dataSourceClassResolver = new DataSourceClassResolver();
    }

    @Override
    public Object invoke(MethodInvocation invocation) throws Throwable {
        String dsKey = determineDatasourceKey(invocation);
        DynamicDataSourceContextHolder.push(dsKey);
        try {
            return invocation.proceed();
        } finally {
            DynamicDataSourceContextHolder.clear();
        }
    }

    private String determineDatasourceKey(MethodInvocation invocation) {
        return dataSourceClassResolver.findKey(invocation.getMethod(), invocation.getThis());
    }
}
